Psu calaculators all different??

david_xr · 13 Jul 2019 at 19:24

as per the title, I've done many different online psu calculators for a idea of what size power supply I should be looking for but they all are coming out very different on their recommendations.
I understand these are more of a ish guide but they vary wildly.

so the spec I'm shopping for is my sig (my existing is too small for 2 cpu's), so far the results have been between 700-1100watts load on them, this then recommends 850w, 1000w, 1200w and a 1600w for my needs.

can anyone help or point in the direction of a decent ish calculator?

thanks

tamzzy · 13 Jul 2019 at 19:46

what is the new spec?

david_xr · 13 Jul 2019 at 20:10

tamzzy said:
what is the new spec?

8600k @5Ghz
2x 1080ti FTW3 hybrid

Basically moving from one gpu to two, currently have Evga 750 G3 psu, that isn’t gonna cut it lol.

tamzzy · 13 Jul 2019 at 20:16

8600k oc = 180w
1080ti x2 oc = 280w x2
other parts = 40w

max power draw = 780w

you'd want the psu to run at approx 60-70% for max efficiency = 1200w
but depending on exactly what you do...could get away with a 1000w psu tbh.

pastymuncher · 14 Jul 2019 at 13:44

It wouldn't surprise me if that card (has 2x 8 pin power sockets) with that big overclock is pulling well over 300w on it's own. I would be looking at a 1200w psu as a minimum. Why a pair of 1080ti's though and not a better single card? I was under the impression that dual card gaming is being run down now and that a powerful single card is the way to go. Surely a 8600k will hold them back as well?

david_xr · 14 Jul 2019 at 16:14

pastymuncher said:
It wouldn't surprise me if that card (has 2x 8 pin power sockets) with that big overclock is pulling well over 300w on it's own. I would be looking at a 1200w psu as a minimum. Why a pair of 1080ti's though and not a better single card? I was under the impression that dual card gaming is being run down now and that a powerful single card is the way to go. Surely a 8600k will hold them back as well?

yep the card has 2x 8pin power sockets, I've been looking at 1200 or 1600 watt psu's most likely will go with the 1600 as I plan on moving to the 9900KS when its released (new Mobo to).
as for why I have two 1080ti's, I originally had just one, only got the second as I got it at a really good price and thought why not, as for being held back it shouldn't, even if it does im not to bothered as I have a cpu upgraded lined up when it released

.